ccna exam cheat sheet

ccna exam cheat sheet.The experimental topology is shown in Figure 13-7.Sl(config)#vlan 2 S1 (config-vlan)#exit Sl(config)#vlan 3 S1 (config-vlan)#exit S1 (config)#interface fastethernetO/1 S1 (config-if)# switchportmode access SI(config-if)#switchport access vlan 2 Sl(config-if)#exit S1 (config)#interface fastethernetO/2 S1 (config-if)# switchportmode accessChapter 13 Extending VLANs .211. s1 (config-if)#switchportaccess vlan 3 SI(config-if)#exit Sl(config)#ip routing Enables the routing function of SI SI(config)#interface vlan 2 Creates VLAN2 port Sl(config-if)#ip address 172.16.2.254 255.255.255.0 Configure the IP address on the VLAN port, and the IP address on the VLAN2 port is the default gateway of the PCI Sl(config-if)#exitS1 (config)#int vlan 3 Sl(config-if)#ip address 172.16.3.254 255.255.255.0 Configure the IP address on the VLAN port, and the IP address on the VLAN3 port is the gateway of PC2To enable routing on a Layer 3 switch, you also need to enable CEF (the configuration command is ip cef), which is already enabled by default on Cisco switches. As with routers, the same routing protocols can be run on a Layer 3 switch. On a Layer 3 switch, multiple SVIs can be in the knock state, and any active SVI can be used as a management port (that is, as the destination address for Telnet or SSH). By default, after an administrator creates an SVI, the line protocol ( LineProtocol) of the SVI is automatically in the up state if the following conditions are met.. The corresponding VLAN exists, that is, the VLAN created by the vlan vlan-id command, or the VLAN whose status is active (active) learned by VTP.. The corresponding SVL exists and its status is not AdministrativelyDown, or the administrator has executed the shutdown command for the SVI.. There is at least one port on the switch that is assigned to the corresponding VLAN and the port line protocol is in the knockdown state. Or there is a Trunk port on the switch and that VLAN is allowed in the VLAN list for the Trunk link. If STP is enabled, the port is to be in the forwarding state. Execute the no switchport command under a Layer 3 switch port to configure the port as a routed port, and IP addresses can be configured under this port, which functions like an Ethernet port on a router, configured as follows: S1 (config)#interface fastethernetO/1 Sl(config-if)#no switchport Sl(config-if)#ip address 172.16.2.254 255.255,255,0